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Journals Mining Engineering : Bina Tambang
Published by Universitas Negeri Padang
ISSN : -     EISSN : 23023333     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Atas dukungan dari jurusan Teknik Pertambangan dengan Penanggung Jawab Dekan Fakultas Teknik UNP (Drs. Ganefri,MPd, P.hd) bekerjasama dengan Ketua Jurusan Teknik Pertambangan (Drs.Bambang Heriyadi,MT) dan seluruh Dosen Jurusan Teknik Pertambangan Fakultas Teknik Universitas Negeri Padang. Jurnal ini terbentuk dan didukung penuh untuk sarana kretifitas Dosen dan Mahasiswa Teknik Pertambangan.
Arjuna Subject : -
Articles 609 Documents
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Evaluasi Pengaruh Penggunaan Jenis Material Dan Ukuran Kedalaman Stemming Dalam Kegiatan Peledakan Terhadap Hasil Fragmentasi, Cost, Dan Recovery Blasting Di PT. Koto Alam Sejahtera Kabupaten Lima Puluh Kota Provinsi Sumatera Barat Fitrya Monica; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 6, No 3 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i3.112495

Abstract

.  At PT. Koto Alam Sejahtera still found fragmentation of boulder ≥ 50 cm, when using drill cutting, it was found that the boulder was 32.1% on average, so it did not match the target ≤15%. When using 1-2 cm of split stone stemming material, it produces an average boulder ≥ 50 cm of 3,1 %. The use of 1-2 cm split stone stemming material results in a fragmentation size, better recovery compared to the result of using drill cutting stemming material, but the use of 1-2 cm split stone stemming material requires additional costs for the purchase of stemming material and in each stemming depth measurement. used to produce different fragmentation sizes. The blasting recovery target was not achieved in July, which was only 72.4% from 90%. The purpose of this study was to determine the effect of stemming depth and use of stemming material on stemming performance on the results of the distribution of fragmentation, costs and blasting recovery. The research method was carried out using stemming depth measuring 1.6 m, 1.7 m, and 1.8 m which will be tested using 2 types of stemming material, namely cutting drill and 1-2 cm split rock material. To recommend the selection with R.L Ash theory, 4 proposed depth measurements were obtained, so that the appropriate stemming depth measurement was 1.6 m. And the use of stemming material is based on actual blasting results using drill cuttings and 1-2 cm split stones. Because the result of 1-2 cm split stone blasting is better but requires additional costs for the purchase of stemming material, the mixing of the two materials is done to reduce the purchase cost, so a 65% split stone mixture is used and drill cutting 35%. The results of the recommendations using the stemming depth measure and the use of stemming mixture materials resulted in more optimal blasting with an average boulder percent of the two triyal activities analyzed using a split desktop resulting in a boulder> 50 cm of 0%. The average recovery value obtained was 90.7% and reduced blasting operation costs to $ 12.956114 / hole.
ANALISIS KESTABILAN LERENG MENGGUNAKAN METODE JANBU SIMPLIFIED PADA LERENG CBP-02 PT. CAHAYA BUMI PERDANA, KECAMATAN TALAWI, KOTA SAWAHLUNTO, SUMATERA BARAT OCI SHANIA PUTRI; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.114108

Abstract

PT. Cahaya Bumi Perdana (CBP) merupakan perusahaan yang bergerak dibidang jasa pertambangan yang melakukan penambangan batubara dengan luas WIUP PT. CBP ±71,96 Ha. Kegiatan penambangan yang diterapkan adalah sistem tambang terbuka dengan metode back filling dan sistem tambang bawah tanah dengan metode room and pillar. Salah satu faktor yang harus diperhatikan dalam sistem operasi tambang adalah faktor-faktor geoteknik pada litologi batuan di daerah penambangan. Karena pada saat proses desain suatu lereng sangat banyak faktor - faktor yang mempengaruhi dan harus diinput sebagai parameter untuk menentukan kemantapan lereng tersebut. Pada PT. Cahaya Bumi Perdana, terdapat lereng dengan ketinggian sekitar ±40 m dengan kemiringan 810 dengan material penyusun batuan terlapukkan (siltstone) yang berkemungkinan akan terjadinya longsor, dengan kondisi lereng tersebut berpotensi membahayakan pekerja dan menghambat produksi. Berdasarkan data hasil pengujian sifat fisik dan mekanik batuan siltstone mendapatkan nilai bobot isi asli 23,45 KN/m3 , nilai bobot isi jenuh 23,78 KN/m3 , nilai bobot isi kering 22,68 KN/m3 , kohesi (c) = 0,0448 Mpa dan sudut geser dalam (ϕ) = 46,43°. Analisis nilai faktor keamanan (FK) dan rekomendasi geometri lereng tunggal menggunakan metode Janbu simplified dengan ketinggian 40 m dan kemiringan 59˚ sehingga diperoleh FK sebesar 1,325 dalam kondisi kering, 1,302 dalam kondisi jenuh, 1,309 dalam kondisi natural.
Pemanfaatan Fly Ash Bottom Ash dan Tawas Untuk Menetralkan Air Asam Tambang Gregorius Bryan Giftin Samosir; Rusli HAR
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.113830

Abstract

PLTU X uses coal as its fuel. The impact of the use of this coal produces 150 – 200 tons of fly ash bottom ash (FABA) waste every day and is pilled up in the ash disposal. This study aims to utilize FABA, alum and mixture of both to neutralized acid mine drainage. Acid mine drainage used as the object of this research is taken from CV. Air Mata Emas Sawahlunto which had pH 3.72. This experimental test was carried out by varying the mass of FABA, alum and mixture of FABA alum to neutralized acid mine drainage. The result of this research on mixing 200 ml of acid mine drainage water samples which had pH 3.7 2  with various FABA masses, it was found 1 gr of FABA could increase the pH of acid mine water to 7.3. It isn’t recommended to use alum for neutralizing acid mine drainage because an increase mass of alum actually makes acid mine drainage more acidic. For neutralizing acid mine drainage using a mixture of FABA and alum, the ratio of both of 5.3 : 0.5 can neutralized acid mine water with pH of 3.72 to 7.71. The mixing of FABA and alum can also accelerate the deposition of FABA used, so that neutral acid mine water can be drained directly outside the mine area. Keywords: Coal, Fly Ash Bottom Ash, Acid Mine Drainage Neutralization, pH, alum.
Analisis Resiko Keselamatan Kerja Dengan Metode Hirarc (Hazard Identification, Risk Assessment, And Risk Control) di Tambang Bawah Tanah PT.Nusa Alam Lestari, Desa Salak, Kecamatan Talawi, Kota Sawahlunto, Provinsi Sumatera Barat Diva Alfaret; Fadhilah Fadhilah
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.113694

Abstract

PT. Nusa Alam Lestari is a company engaged in coal mining that implements an underground mining system and has great risks and dangers, so it is necessary to take action to raise awareness of the importance of occupational health and safety at every stage of the activity. Hazards and risks can occur when ventilation installation activities and support installation activities take place, it is necessary to identify potential hazards to obtain data on potential hazards, then carry out weighting to determine control plans that are suitable for conditions Hazard potential analysis and risk control in this study used the hazard identification method, risk assessment and risk control (HIRARC) using the likelihood and saverity parameters to obtain a value for each hazard risk. Data obtained using questionnaires, interviews, and observations of work activities. The results showed that the identified risks in the ventilation installation were 18 potential hazards that might occur. Questionnaire analysis using the HIRARC method found the level of risk in the ventilation installation work, namely moderate risk (moderate risk) 11% with the criteria of slipping and falling while carrying the wind hose in the tunnel and colliding with the tunnel roof support when carrying the wind hose in the tunnel. The identified risks in the installation of supports are 27 potential hazards that may occur. Questionnaire analysis using the HIRARC method found the level of risk in the work of installing the supports, namely high risk (high risk) 4% with the criteria of being hit by hanging rocks when dismantling old supports and moderate risk (medium risk) 11% with the criteria of slipping and falling while transporting wooden supports collided with the support for the roof of the tunnel while transporting the support logs, crushed the support wood when dismantling the old support Meanwhile, the risk control uses the hierarchy of control method, namely elimination, substitution, engineering control, administrative control, and PPE.
Evaluasi Kinerja Alat Gali Muat dan Alat Angkut Menggunakan Metode Quality Control Circle Untuk Mencapai Target Produksi Batubara Pada Tambang Terbuka PT. Allied Indo Coal Jaya, Parambahan, Sawahlunto. Ridwan Saputra; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 6, No 3 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i3.112552

Abstract

One of the steps to control the rate of productivity and accuracy in achieving the monthly plan is to observe or evaluate the performance of the digger fit and conveyance. This is what PT Allied Indo Coal Jaya has done in evaluating the performance of the production department in extracting coal material. Data for October 2019 shows that the planned coal production target of 30,000 tonnes / month was only achieved 16,913 tonnes / month. A production management study was conducted by applying the Quality Control Cycle (QCC) method. This method makes it possible to conduct a study of the performance evaluation of heavy equipment and the obstacles experienced during the production process. The study begins by recalculating the initial conditions by considering the mining equipment used, namely the CAT 330 Excavator and the DT Hino FM 260 JD. The actual productivity of 1 unit of Exca CAT 330 reached 21.814,173 tons / month and DT Hino FM 260 JD reached 18.767,03 tons / month with a total of 4 units of DT, the match factor of heavy equipment reached 0.65, After evaluating the Fishbone Diagram, it was found that there were major problems namely environmental factors, equipment and man power that affect working time. Performance improvement recommendations based on the Paretto Diagram, considered to optimize uptime. The results show that with increased productivity with 1 unit of exca CAT 330 equipment of 26.541,89 tons / month and 4 units of DT coal production increased by 30.289,24, the match factor of heavy equipment reached 0.85. These results indicate that the performance of the equipment can still be improved to achieve the monthly coal production target
ANALISIS OPTIMALISASI LOSS TIME ALAT GALI MUAT UNTUK MENCAPAI TARGET PRODUKSI OVERBURDEN DI PIT TIMUR PT ALLIED INDO COAL JAYA KOTA SAWAHLUNTO, SUMATERA BARAT. Arif Nandi Rivai; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.114146

Abstract

Overburden stripping is an activity that affects mining activities, the more optimal the overburden stripping activity, the coal mining activities will be in accordance with the targets set by the company. PT Allied Indo Coal Jaya in the East Pit has set an overburden production target in November 2020 of 110,000 BCM/month for 2 mining fleets. However, based on overburden production data, the production achieved was 86,126.20 bcm, only 78.30% of the target achieved. The available working time for each mining fleet is 268 hours, but the time for the Unit 018 fleet is 216.74 hours and the 021 fleet is 220.08 hours. There is losstime which is a factor in not achieving the overburden production target. The losstime problem consists of Idle Time and Delay Time. Based on the problem, action is taken on losstime for digging equipment with optimization of overburden production time. Analysis of the data used is multiple linear regression analysis using the least squared method. To get the optimal time simulation of loss time in meeting production targets in the East Pit of PT Allied Indo Coal Jaya. The data used are loss time data (idle time and delay time) and aqua production data. Optimal losstime that can be applied to the fleet Unit 018 with an idle time of 0.41 hours/day and a delay time of 0.05 hours/day and the fleet Unit 021 with an idle time of 0.57 hours/day and a delay time of 0.08 hours/day. Where the overburden production achieved from these two fleets is 114,020.57 bcm/month. Keywords : Production, Losstime, least squared
Analisis Kestabilan Lereng Pada Rencana Lereng Akhir Penambangan Dengan Tinggi 55 m PT. Atika Tunggal Mandiri, Kecamatan Pangkalan Koto Baru,Sumatera Barat andre martona risky; Raimon Kopa
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.114035

Abstract

PT. Atika Tunggal Mandiri is a company engaged in the andesite mining business in kabupaten Lima Puluh Kota. In open pit mining, the stability of the mine slope is the most important factor that must be considered in thesustainability of mining activities. The author conducted research at the site of the final mining slope of PT. ATM, with anactual slope height of 13 m and a slope angle of 85°. The final slope of the mine will increase in height, this is due to theexcavation of andesite material to a depth of 55 m. Therefore, it is necessary to review the stability of the slope so that t heslope does not collapse and does not cause losses to the company.In this study, the analysis used is kinematic analysis with dips software and slope stability analysis using the Finite Elementmethod with phase 2 software. which has a landslide potential of 23.37% (Flexural Topling of 12.68% while Direct Toplingof 10.59%). Second, the results of the analysis of the factor of safety (FK) of the slope using the Finite Element method onthe actual slope of 13 m with an angle of 85° are 2.12 (natural condition) and 2.09 (saturated condit ion). Third, to get a safeFK which is 1.30 by making a double bench with a height of 55 m with an overall angle of 65° (the height of the first singleslope is 20 m with an angle of 85° while the second single slope is 35 m with an angle of 65°). FK values obtained are 1.33(natural condition) and 1.31 (saturated condition). Fourth, it is preferable to write a triple bench with a height of 55 m withan overall angle of 70° (the height of the first single slope is 20 m with an angle of 85°, the second single slope is 20 m withan angle of 88° and the third single slope is 15 m with angle of 88°) obtained FK values are 1.35 (natural condition) and 1.33(saturated condition).
ANALISIS KESTABILAN LERENG MENGGUNAKAN METODE JANBU PADA LERENG PERMUKAAAN LUBANG BMK-14 DI CV. BARA MITRA KECANA DI DESA BATU TANJUNG, KECAMATAN TALAWI, KOTA SAWAHLUNTO, PROVINSI SUMATERA BARAT Wahyu Dicky Guntara; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.113679

Abstract

CV. Bara Mitra Kencana is a company engaged in mining and has invested in the city of Sawahlunto. The mineral that has been mined is coal. Administratively, the location of the Exploitation KP is in Tanah Kuning, Batu Tanjung Village, Talawi District, Sawahlunto City, West Sumatra Province with an area of 70.53 hectares. The results of the study were landslides that occurred in the CV area. Bara Mitra Kencana-14 is a planar sliding with a landslide rate of 85% in the direction of the N87oE/44o landslide. Therefore a recommendation for a single slope with a height of 35 m and an initial slope of 80o is changed to a slope of 64o and the safety factor (FK) in the natural state is 1.403 and the safety factor (FK) in saturated conditions is 1.260 and the factor of safety (FK) in the natural state is 1.403. safety (FK) in dry conditions is 1.509 and the slope is said to be in relatively safe conditions.
Analisis Pengaruh Geometri Peledakan Terhadap Fragmentasi Hasil Peledakan Limestone Pada PT. Semen Padang, Kota Padang. Laju Boy Ardi Harahap; Dedi - Yulhendra
Journals Mining Engineering : Bina Tambang Vol 6, No 3 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i3.112655

Abstract

This final project is based on the fragmentation of limestone blasting resulting in a size of ≥ 80 cm which hinders the performance of the crusher. The purpose of this final project is to get a blasting geometry recommendation; to achieve a fragmentation value of  ≥ 80 cm with a retained percentage of 10%. Actual blasting geometry with blast hole diameter 4 inches, burden 3,05 m, spacing 3,04 m, blast hole depth 7,59 m, subdrilling 0 m, PC 4,35 m, stemming 3,24 m, ladder height 7,59 m and PF value 0,60 kg / m3. The percentage of rock fragmentation resulting from blasting in the actual geometry uses a split desktop with the percentage of fragmentation ≥ 80 cm retained, namely 21,605%. The geometries that have a major influence on the actual blasting result fragmentation are; Burden with (R2) = 0,7705 or 77,05%, Space with  R²) = 0,7495 or 74,95% and PF with (R²) = 0,6356 or 63,56 %. Therefore, the author tries to propose a blasting geometry so that the resulting fragmentation can fulfill the policies that have been made and the non-uniformity of blasting fragmentation results can be better. The proposed geometry uses the RLAsh formula with the proposed burden of 2,5 m, spacing of 3,5 m, height of 7,5 m, PC 5,75 m, stemming 2,5 m, subdrilling 0,75 m, blast hole depth  8,25 m and PF 0,85 kg/m3. Based on the proposed geometry improvement, the percentage retained by rock fragmentation with predictions using the Kuz-Ram method is obtained, the percentage retained by fragmentation is ≥ 80 cm, which is 5,8%.
Optimalisasi Produksi Batubara Pada Proses Coal Getting di Pit 3 PT. Jambi Prima Coal, Kecamatan Mandiangin, Kabupaten Sarolangun, Provinsi Jambi Rico Fernandes; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 6, No 3 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i3.112518

Abstract

PT. Jambi Prima Coal is a company engaged in coal mining, which is located in Pemusiran, Mandiangin, Sarolangun, Jambi. The coal production target in PIT 3 PT. Jambi Prima Coal is 20,000 tons /month In July 2019. In fact, coal production in July can only reach 89.25% of the total production target of 20,000 tonnes / month, coal production that can be produced is only 17,850 tonnes / month. Therefore it is necessary to conduct research using the Quality Control Cycle (QCC) to improve and optimize coal production. In this study, the required data are in the form of excavator and conveyance cycle time, field resistance, the number of mechanical devices used and the productivity of the dig and load equipment. The results of calculations using the Quality Control Cycle (QCC) method were carried out by increasing work efficiency, reducing loss time and improving working time so that the coal production obtained was 25,431.94 tons / month, which increased production by 37.9%. This production result shows that the improvements made have resulted in an increase in production yields from previous results.

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